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authorTimothy Pearson <tpearson@raptorengineeringinc.com>2016-03-03 03:05:17 -0600
committerMartin Roth <martinroth@google.com>2016-03-11 18:48:38 +0100
commited85f614b06826721fdaf82df6cc049c4e35815a (patch)
tree9752fd3dd2a531c4999af6287e88a7cf667b7a6a /src/northbridge
parent6116f369e98afef29e284c6148414d8c5832689d (diff)
downloadcoreboot-ed85f614b06826721fdaf82df6cc049c4e35815a.tar.xz
nb/amd/mct_ddr3: Consolidate calls to MCT minimum clock setting fetch
Change-Id: I4497b0be6ed6c90dbb31e89013feed8ff5ff9071 Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> Reviewed-on: https://review.coreboot.org/13885 Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com> Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/northbridge')
-rw-r--r--src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c b/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c
index b8d89fe675..f0e670b473 100644
--- a/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c
+++ b/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c
@@ -1146,6 +1146,7 @@ static void dqsTrainRcvrEn_SW_Fam15(struct MCTStatStruc *pMCTstat,
uint8_t lane;
uint8_t nibble;
uint8_t mem_clk;
+ uint16_t min_mem_clk;
uint16_t initial_seed;
uint8_t train_both_nibbles;
uint16_t current_total_delay[MAX_BYTE_LANES];
@@ -1163,6 +1164,8 @@ static void dqsTrainRcvrEn_SW_Fam15(struct MCTStatStruc *pMCTstat,
print_debug_dqs("\nTrainRcvEn: Node", pDCTstat->Node_ID, 0);
print_debug_dqs("TrainRcvEn: Pass", Pass, 0);
+ min_mem_clk = mctGet_NVbits(NV_MIN_MEMCLK);
+
train_both_nibbles = 0;
if (pDCTstat->Dimmx4Present)
if (is_fam15h())
@@ -1274,7 +1277,7 @@ static void dqsTrainRcvrEn_SW_Fam15(struct MCTStatStruc *pMCTstat,
/* Adjust seed for the minimum platform supported frequency */
initial_seed = (uint16_t) (((((uint64_t) initial_seed) *
- fam15h_freq_tab[mem_clk] * 100) / (mctGet_NVbits(NV_MIN_MEMCLK) * 100)));
+ fam15h_freq_tab[mem_clk] * 100) / (min_mem_clk * 100)));
for (lane = 0; lane < MAX_BYTE_LANES; lane++) {
uint16_t wl_pass1_delay;
@@ -1304,7 +1307,7 @@ static void dqsTrainRcvrEn_SW_Fam15(struct MCTStatStruc *pMCTstat,
for (lane = 0; lane < MAX_BYTE_LANES; lane++) {
seed_prescaling = current_total_delay[lane] - register_delay - 0x20;
- seed[lane] = (uint16_t) (register_delay + ((((uint64_t) seed_prescaling) * fam15h_freq_tab[mem_clk] * 100) / (mctGet_NVbits(NV_MIN_MEMCLK) * 100)));
+ seed[lane] = (uint16_t) (register_delay + ((((uint64_t) seed_prescaling) * fam15h_freq_tab[mem_clk] * 100) / (min_mem_clk * 100)));
}
}